fix(pricing): align jest and @types/jest to 29.x to match ts-jest 29.x

jest 30.x and ts-jest 29.x cannot share a jest-util version, causing npm
to nest jest-util 30.x inside every @jest/* package with no top-level
copy for ts-jest to resolve. Pinning jest and @types/jest to ^29.7.0
restores the correct flat resolution and unblocks integration tests.

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

Author: jeastham1993